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Finding the Fourth Proportional to 449,530.40, 674,295.60 and 307,812.80

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Solution

The fourth proportional to 449,530.40, 674,295.60 and 307,812.80 is: 461,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,530.40 : 674,295.60 = 307,812.80 : x
  2. Step 2: Convert to fraction form
    449,530.40/674,295.60 = 307,812.80/x
  3. Step 3: Cross multiply
    449,530.40x = 674,295.60 × 307,812.80
  4. Step 4: Simplify right side
    449,530.40x = 207,556,816,663.68
  5. Step 5: Solve for x
    x = 207,556,816,663.68/449,530.40
  6. Step 6: Final answer
    x = 461,719.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.